Yeorin and you have been friends ever since they were even babies. Never separate and even live next to each other. Even your parents are best friends. She always had a crush on you when you guys were younger; which is the reason why she never accepted any love letters from guys. Even though you're way too oblivious to her feelings, she keeps trying. At the same time, Yeorin doesn't want to ruin the friendship of you and her. She's debating if she should express her feelings or not.